VB-E double conical flange explosion proof

by Italvibras

The double-conical flange VB-E vibrators have been designed for use in industrial processes in environments with a potentially explosive atmosphere, caused by gas and dusts, in compliance with ATEX Directive (94/9/EC).

They are supplied without eccentric weights, which must be realized and mounted by the Manufacturer of the vibrating machine.  In particular, these vibrators can be used in areas 1 and 2 (gas) and in areas 21 and 22 (dusts) according to the layout and following features:

Category:  ll 2 GD

Level of protection:  Ex e llC T3/T4 Gb, Ex tb lllC T...°C Db

EC certificate:  LCIE 06 ATEX 6092 X 

Zones of use:  1, 2, 21, 22  

Technical features

Power supply

Three-phase voltage from 220V to 690V, 50Hz or 60Hz, suitable for use with an inverter from 20Hz to the base frequency with constant torque load profile. 

Polarity

4 poles

Conformity with European Directives

Low Voltage 2006/95/EC, ATEX 94/9/EC.

Reference Regulations

IEC/EN 60079-0, IEC/EN 60079-7, IEC/EN 60079-31, EN 60034-1.

Controls

The components that affect protection are 100% accurately controlled and recorded.

Functioning

Continual service (S1) at maximum declared centrifugal force and electric power. 

Centrifugal force

Proportioned for a centrifugal force equal to 5000 Kgf. (49 KN), with eccentric weights not included, to be made by the user.

Mechanical protection

IP66 according to IEC 68, EN 50102.

Protection against mechanical impacts

IK08 according to IEC 68, EN 50102.

Insulation class

Class F (155°C)

Tropicalization

Standard with "drop by drop" trickle system.

Ambient temperature

From -20°C to +40°C, on request it is possible to have vibrators for maximum ambient temperatures of +55°C in temperature class T3.

Vibrator thermal protection

On request with PTC rated thermistor heat detectors 130°C (DIN 44081-44082).  Also on request thermistors with different temperatures and anti-condensation heaters.

Fixing of the vibrator

In all positions and therefore without restriction.

Lubrication

All vibrators are lubricated in the factory and do not require further lubrication if used in normal operating conditions ("FOR LIFE" lubrication).  In heavy duty operating conditions periodical re-lubrication may be applied.

Electrical connection box

The size guarantees passage of tools used for fixing the vibrator to the vibrating machine.  The electrical connection must be carried out using the relative connectors inserted inside the connection box.  Special shaped terminals allow to fix the power supply cable, protecting it from loosening.

Electric motor

Three-phase asynchronous type.  Designed for maximum starting torques and torque curves specific to requirements of vibrating machines.  Insulated windings using "drop by drop" system with class H resin.  Thr rotor is die cast aluminium.

Casing

In spheroidal cast iron to have high strength and optimal elasticity.  An external earthing screw is located on the casing as prescribed by standard IEC/EN 60079-0.

Bearing flange

Constructed in spheroidal cast iron.  The geometry of the flange transmits the load to the casing uniformly.

Bearings

Custom made with particular geometry, especially designed for Italvibras, suitable to support both high radial and axial loads.

Motor shaft

In treated steel alloy (Isothermic hardening) resistant to stress.

Eccentric weights and weight covers

Not envisioned, to be mounted by the user.

Painting

Electrostatic surface treatment based on polymerised epoxy pplyester powder in oven at 200°C.  Tested in salt spray for 500 hours.

Stainless steel protection

On request, corrosion high grade protection (stainless steel micro suspensions in a polyurethanic paint) is available. 

Please contact our office for the many certifications available. 1-888-558-9956.